Final answer:
The density of texture in a written or typeset page is referred to as 'typographic density,' which affects the visual and readability aspects of a page.
Step-by-step explanation:
The density of texture in a written or typeset page is called its typographic density. This term relates to how text and images are arranged on a page, which can affect both the visual appeal and readability. Typographic density can vary from light to dense, with dense text having more words, lines, or images in a given area, potentially leading to a heavier and sometimes less approachable page layout.
In contrast, less dense typographic layouts might be more inviting due to increased white space and fewer words per line or page. Just as density in physical terms is defined as mass per unit volume, typographic density can be seen as the 'mass' of visual elements in the 'volume' of page space.